Acrison’s Model 170 Series of Volumetric Feeders for dry solids are specifically designed for complete product cleanout without the need for disassembly or mechanical changes. The Model 170 Series features a uniquely configured Auger/Agitator Metering Mechanism that completely fills the metering auger with product of a consistent state and a Circular Wide-Throat, Flat Bottom Feed Chamber with a slowly rotating horizontal Agitator that ensures the flow of product out of the supply hopper directly into the feed chamber (and metering auger). These feeders 'self-empty' when permitted to operate until empty, and also feature a novel discharge port for rapid material emptying when needed—making them ideal for applications where rapid product changeover or bare minimum downtime is critical.